frecuantly i receive this alert. how can i block this attack. ISA Server name: PROXY01 ISA Server detected an Internet Protocol (IP) half-scan attack from IP address 200.193.76.187. For more information about this event, see ISA Server Help. Please Help _____ ___________________________________ Julian F. Bueno Ingeniero de Soluciones Intelecto * jbueno@xxxxxxxxxxxx ' (572) 6827444 Ext 17 ( (310) 4582141